Commit 701b7b1d authored by Simon Glass's avatar Simon Glass Committed by Tom Warren

tegra: Introduce SRAM repair on tegra124

This is required in order to avoid instability when running from caches
after the kernel starts.
Signed-off-by: default avatarSimon Glass <sjg@chromium.org>
Signed-off-by: default avatarTom Warren <twarren@nvidia.com>
parent cd3c6769
......@@ -26,6 +26,12 @@ struct flow_ctlr {
u32 cpu_pwr_csr; /* offset 0x38 */
u32 mpid; /* offset 0x3c */
u32 ram_repair; /* offset 0x40 */
u32 flow_dbg_sel; /* offset 0x44 */
u32 flow_dbg_cnt0; /* offset 0x48 */
u32 flow_dbg_cnt1; /* offset 0x4c */
u32 flow_dbg_qual; /* offset 0x50 */
u32 flow_ctlr_spare; /* offset 0x54 */
u32 ram_repair_cluster1;/* offset 0x58 */
};
/* HALT_COP_EVENTS_0, 0x04 */
......@@ -43,4 +49,10 @@ struct flow_ctlr {
#define CSR_WAIT_WFI_SHIFT 8
#define CSR_PWR_OFF_STS (1 << 16)
/* RAM_REPAIR, 0x40, 0x58 */
enum {
RAM_REPAIR_REQ = 0x1 << 0,
RAM_REPAIR_STS = 0x1 << 1,
};
#endif /* _TEGRA124_FLOW_H_ */
......@@ -9,7 +9,7 @@
#include <asm/io.h>
#include <asm/types.h>
#include <asm/arch/flow.h>
#include <asm/arch/powergate.h>
#include <asm/arch/tegra.h>
......@@ -75,11 +75,29 @@ static int tegra_powergate_remove_clamping(enum tegra_powergate id)
return 0;
}
static void tegra_powergate_ram_repair(void)
{
#ifdef CONFIG_TEGRA124
struct flow_ctlr *flow = (struct flow_ctlr *)NV_PA_FLOW_BASE;
/* Request RAM repair for cluster 0 and wait until complete */
setbits_le32(&flow->ram_repair, RAM_REPAIR_REQ);
while (!(readl(&flow->ram_repair) & RAM_REPAIR_STS))
;
/* Same for cluster 1 */
setbits_le32(&flow->ram_repair_cluster1, RAM_REPAIR_REQ);
while (!(readl(&flow->ram_repair_cluster1) & RAM_REPAIR_STS))
;
#endif
}
int tegra_powergate_sequence_power_up(enum tegra_powergate id,
enum periph_id periph)
{
int err;
tegra_powergate_ram_repair();
reset_set_enable(periph, 1);
err = tegra_powergate_power_on(id);
......
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